Loading and unloading device for vehicles



ay P. DUCONDU LOADING AND UNLOADING DEVICE FOR VEHICLES Fil ed 0t. 18, 1924 2 Sheets-Sheet 1 FIG? INVENTOR PAULDI/CONDU BYMMTMX 8& ATTORNEYS May 31, 1927.

P. DUCONDU LOADING AND UNLOADING DEVICE FOR VEHICLES 2 Sheets-Sheet Filed 001,- 18, 1924 1/ I lI/J Ill 1/ IN VENTOR PA UL DUC ONDU B2Qei%0l J/0n%a6;/& (i

ATTORWS LOADING AND TJ'NLOADINQ- DEVICE FGR VEHICLES.

Application filed October 18, 1924. Serial No. 744,382.

This invention relates to new anduseful improvements in in )ading devices for vehicles and the object of the invention isto provide a simple, durable and easily operated attachment for vehicles to facilitate the loading and unloading of heavy or bulky objects.

A. further object is to provide a device of the class stated which will be easily attached to any of the standard types of trucks.

In my invention i provide a loading plat form which may be singedly attached to a fived portion on the underside of a truck. The attachment arranged so that the platform may be lowered to receive heavy or bulky objects. A self locking hoisting unit is pro 'ided for raising or lowering the loading platform, which may be tied to the underside of the main body of the truck when not in use or when the truck is travelling.

In the drawings:

Figure 1 is a side elevation of the loading platform in the raised position.

Figure 2 is an end view of the truck with the platform in the raised position.

Figure 8 is a side elevation of the loading platform in the lowered position.

Figure 4 a plan view of the device.

Figure 5 is a sectional elevation of one end of the hollow tubular member showing the method of attaching the vertical supports and platform supports.

Figure 6 is a sectional. plan of the verti cal supports taken on the line (5-6 Figure 1.

Figure '7 is a side elevation of one form of hoisting unit which may be used.

Referring more particularly to the-drawings, 1t designates the floor of a vehicle body provided with a rear axle 12 connected in any suitable manner to the body by means of the frame 13. A hollow circular membcr 14 is attached to the body of the vehicle or the frame 13 by means of the links 15, each hingedly connected at one end 16 to the frame 13 and connected in any suitable man ner at the opposite end to the member 14. The loading platform supports 17 are pro vided with bearings 18. which are rotatably mounted on the reduced portion 19 formed t each end of the member 14. The brackets engage with the shoulders 20 to prevent lat eral movement of the loading platform 21, which any he bolted or otherwise secured to the supports 17. Slidably mounted in the ends of the tubular member are the arms or struts 22, which are so positioned that they clear the side edges L3 of the floor 11, and

to the end of the platform supports by means of the links 26 and are provided with hooks 28 which engage with the pins 29 passing through channel members 30 secured to the top of the arms 22. The tying members 27 and to the top of the arms 22 by means of the pins 32 passing through the links 31 and the channel members 33 secured to the arms i t will be readily understood that modilications may be made in the attachments fol-the tying members, as the meansdisclosed are for illustrative purposes only. The preferred form of hoisting mechanism is shown in Figures 1, 2, 3, v4 and 7 and is mounted to clear all. fixtures on the underside of the truck. The hoisting mechanism is seourcdto the underside of the truck body by means of the brackets 34 situated near the outer edges of the flooring, as shown. Rotatahly mounted in the bearings 34 is the hoisting spindle 35, which extends from side to site of the vehicle andto which are secured the chain sprockets 86 one at each end 0 ings 34.

Passing over the sprockets are the hoisting chains 37, the links of which en- 41 positioned near one end. of the spindle."

The hoisting pawl 43 is oscillatably mounted ona pin 43 passing through two plates 44. which are rotatably mounted on the spindle The plates are mounted-one on each side of the ratchet wheel and an operating; handle 45 is secured to the plates by means of the bolts 46. The-end of the are secured at one end to the body ot the vehicle by any sultable means c spindlefln close proximity to the bearall of the pawl and the other end to a bar 49 attached to the. underside Oi the truck or to the bracket e-l. The other end 50 ot the hoisting pawl extends slightly beyond the pivot pin 43 and a tension spring 51 is attached to this end. One end of this spring is attached to a pivotally mounted pm or bar 52 attached to the plates. This pin or bar, when placed in the position shown in Figure 7, exerts a pull on the pawl through the medium ot the spring 51, which tends to hold the end -l-7 of the pawl in contact with the teeth of the ratchet wheel. in lowering, the bar 52 is manually placed in the position shown in dotted lines and the spring 51 pulls on the end of the hoisting pawl in such a manner that the end i? is pulled out of contactwith the ratchet wheel teeth when the tension on the spring 48 is reduced by raising the handle 4L5. The holding pawl 53'is pivotally mounted on the bracket 34: in such a manner that the pin 34 is supported on each side of said pawl. The portion 54 is thrown into engagement by its own weight, the centre of gravity of said holding pawl being so positioned that the pawl tends to fall toward the centre of the ratchet wheel. A. spring 55 is wound around a pin 56 passing through the plates. One end 57 of this spring is positioned to engage with the projeotion 58 of the holding pawl and the other end 59 is adapted to engage with the bar 52 in a special manner hereinafter described in the operation-of the device. The hoisting ncchanism'is mounted to clear all obstacles i from the spirit of the invention.

on the underside of the truck. Lateral brac in'g members 60 are secured to the links 15 to reduce to a minimum any side-swaying motion of the attachment.

Modifications may be made in the construction of the device without departing Such modifications may be made by substituting any of the well known types of hoisting mechanisms for the type shown. It may also be statedthat the arms 22 and the member let may be made in one piece and constructed or any suitable sections.

The operation of the device is very simple. The load is supportedon; the platform, which is supported at one end by the member 14., said member beinghingedly attached to the body of the truck by the links. The other end of the platform is held inthe approxi- Lmate horizontal position by means of the tying members 26 and 27 and the supporting arms 22, which are rotatably mounted in the hoistin pindle.

27, one end of each of sai l chains being culled to the -Ii" of the truck and the other end to the top of the arms. The platform is held in position by the chains 96., one end of each chain being secured to the cantilevered end of the platform and the other end to the top of the arms. l 'hc arms form struts for resisting the results it forces erted by the pull on e clus or tension members duejto the loa oi the plutiku'in. The platform is raised .or lowered by means of the hoisting unit. The hoisting char is are connected to the member 14iand are raised or lowered by means of the rotary movement of the s'i ckets seemed to the s Movementis imparted to the spindle by means of the ratchet form of hoisting unit lO. In hoist ng, the hoisti pawl engages with the ratchet teeth and the handle is pushed downwardly until the holding pawl engages with the teeth oi the ratchet wheel. When the handle is moved in the upward direction, the pawl rides over the ratchet teeth. In lowering, the bar isplaced in the position shown in dotted lines in Figure '"4', so that the tension in the spring 51 tends to pull the hoisting pawl out of engagen'ient with the *atchet teeth. handle is moved in the downwart direction and takes the load off the holding iawl, which is thrown out of engagement with the teeth by the spring The handle is then raised with the load supported on the hoisting pawl until the sprii'ig allows the holding pawl to engage with the next tooth.

The load is then taken it'rom the hoisting formed between two of the ratchet teeth.

if the load is bulky and extends bODWfilblll lQ edges 01" the loading platiorm. the arms may be pulled outwardly toallow the load to he rolled or pushed on to the floor of the truck. When the truckloading device is not in use, the arms 22 being rotatably mounted on the member 14:, may be folded inwardly to lie in the horizon and may be secured by an, s to the truck body. The loading plat" being also rotatably mounted on the member 14:, may be turned or swung into the position shown in dotted lines in Figure l. The chain 26 shown in dotted lines in Figure 1 may be used to holdthe platform under the truck when not in use. will also be The tal directioin ftable means ltltl v iii'i'g the combination with avehicle lioorjof' "vehicle floor,,rigid link connection between bearingplatform 'eoni ected'to the U-shaped seen that 1 the Lpiatfoem; being rotatably mounted n' the member 14, maybe swung into the vertical position and used when the truck'is travelling;- 1

avingrthus described my iiiventioii', wha t I claim is i 7:

as a gate ILA loading device for vehicles, compris' m in combination with a veh cle floor, a

cantilever struct-ure including a'central supportingineinber, a link connection between the supporting member and vthe vehicle, a

"load l bearing ='plattor'm, platform supporting members pro ecting from. the central supporting member, and 1161181011 members between the platform supporting member and [the central -,membe'r and between-the central member and the floor otthe vehicle; A loadingdevice 'TfOIIVQhlClQS compris;

a U-shapedni'ember adapted to embrace the the U-shaped' member and the.vehicle,' tying members-between theveliiele and the extremities of the U-shaped member, a load men iben-ro'nnectionbetween said platform and said U-shaped n'iembertowardthe ex- 7' age thereof with the. vehicle and hoisting ing the combination with 'a vehicle floor of a cantilever structure comprising ,a centre 1 the top thereof and the vvehicle;and a hoistotthe strut andtheq-vehiele.

tremities'thereof, and hoisting connection be-- tween the lower end ofthe U-shaped membertween theupper ends of said u-sha'pedvmein-r her and the .vehicle', a load bearing platform supported at one edge at theicentral part of the U-shaped member having 'link connec;-"

tion with; the yehicle, link connection ,beQ tween the opposite 'e'dge'olt' the platform. and

the strut member adjacent'the flexible link connection between the lower end oi the strut member and the vehicle.

A 'loadingdevice tor vehicles coniprisstrut, a bottomchordincluding a pair of,

v rigid members each' hingedlyconnected at oneend to the lower end of the strut, one

of said chord members'being hingedly vconnected a t its opposite end to the vehicle and a top chord comprising flexible members connected between V the tree fend of the bottom chord and the center strut=-nearthe top. thereof, and between the center. strut" near ing appliance connected between the bottom 7 5. A loading device for vehicles', compris'-i ing the combination with a vehicle "of-a canti- Y lever structure comprising.- a strut, a ointerl a bottom chord and a flexibleltop chord conthe structure.

the armsto thelbodvof the vehicle; I 10. "A loading device for vehicles compris- I nected at remote points to the strutiand gcon hnecteditogether 'at the free end of thestructure theopposite ends: of said chords being. li' ingedly connected at remote points to the lvehicl V bGiTW G ClllllQ llOthOItl chord and the vehicle.

e, an d a "hoisting appliance connected loading device for vehicles, compris ing the combination witl' vehicle; a cantilever struct ireanchored at one endu-to the vehicle and including on each [side a bottom tween saidv chords intermediate ,the ends bottom fchords apart, swaly bracing holding the structure against lateral 'niovemenfi a hoisting appliance connected" between :the 'bottom'chcrd and the vehicle, and 'a'loading by th'efiunanchoredend of I plattorm arried =7. A; device according toicla'im 65lin-which vthe bottom chord ishinged' and' th e top chord separable therefrom.to'perinit moveinent of the' 'outer portion or "the: bottom ch( "d and the loading platfornito a post" tion :under the inner part of the chord said top chord .beiiig-1'econnectable to iholdthe loadingdplat'lorm in such unswung position.v

"r chord, a top chord and a strut; connected'be ineiriber SJEZClilQ- the J 8. Ailoadingdevice for vehiclescompris ing in combination with n vehicle floor; an

attachment including a hollow circular inem-" ber links secured to the hollow member and 3 rotatably attached to the body ot the vehicle;

vertically "disposed side Var-ms rotatably mounted in the hollow member, and means for attaching: the arms to the body of thevehicle. i

9. A loading device for m ncombination witha vehicle H00 {in attachii'ie'nt including a hollow member 6X1 tending in the transverse" direction, of 1 the s vehicles compris I floor, links secured to the hollow member and l in gedly attached to the body of the \-ehicle,-a loading platforn'i rotatably at- I I tached to the llQllOW'DlQlIllJGIg armsrotatably attached to the hollow membeijflex'ible means for attaching the loading platform to the arm, and flexible. mearls'for attach ng ing, in" combination with" a" vehicle floor, an

attachment including; a hollow member extendinejacross the back the vehicle, links hingedly connecting the hollow member Witlr "thevbody of the vehicle, a platforinrotatiibl y i secui'edto the hollowmemher, arms secured to the hollow iiieiiibei',"flexible 'means for securing the arms to the 'bodyof the vehicle, j

means for securingthe platform to the arms 1 a d a'hoistingunit secured to the body of p I the-vehicle for raising or lowering the .at j I tachme nt. V v p 3:1. A loading dev ce for vehicles comprisj in combinationwith, i i-vehicle floor, an

attachment including a :hollow inenib'erf extending across the back otthe vehicle; means I llO ' for hingedly connecting the hellow nembel withtheibcdy ofthe vel'licle, platform sup-Q .pofting v'menibe zrs rotatablyt-tach d QtQ the hollow membeflstr-uts slidablyxan'd rotatebly afmchecl to" the hollow m'ember," flexible means forattachihg the arms to the bedyl of; 1 thevcl'li'c, v fhellplaiform. supporting members f0 we: fer ms icnd hoisting means secured v. to the I body 01 the vehicle ifor'misingg and lcwering arms. mmbly il'lQlIfitOd i i the ends'fofche" member, chani'lelsysecurd"to ihe upper end of the arms, pinepags ifg throughthe said, v channels,flflctiible members {secured to 7th; bocy (iftheivehicle and v ibel' wifl'rthebcdy Qji? the Vehicle 21 p13,

ro'tatably mountedon the circular 111cm e; mid fiexible means for a tteching the attachment. Y

12. .u 'loacllxlg devlce "her -extending across theyeai' Of the Vehicle, I'm" hlngl edly"conncctmg the: hOlLOW; men

toi'the pins passing thmugh ti he channels,

flexible members secured/c6 the plat-6311 and V detachably secured t othe 131113 passlng c detachably. Sim-ea m y hand. I

throu h the i-clmnnels; m (a 's e'lfic kihg hoisting unit secured to fiche under sidecf :the

.qsga'id unit being 1 Usedjf fm 51" the ttachment. 1

13.- Ailoadingz clevicefornve ne'zni'bem means for hingedly securing the ioeding pk form rofi atably V ellow member; arms mou nted 1 11 thelencls t hc .holl'ofw cucular attaching, flic'said, upper eiids of the He i'etacably mounted on th'ejufi c'lefside u. h'cis'ring chainsfsecured to the z-liollow mid a double in witness whereof, I

thefiocr, sprockets; m'o'unfed' dn thfi Spin e e 45 Jncmber and engaging \vit11* t he sprockets, pawl and ratchet wheel 11oist-- ing unit for op'ei'etingl'the sprockets; 7

have hereunto; set 

